两人对炼筋骨，体力，灵敏度，毋需大场地、钱和器械
关键要有个团体，经常交换对手
https://www.bilibili.com/video/BV1zN411D7GE?t=21.0
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修改:chunzai FROM 117.143.139.*
FROM 117.143.139.*